https://etd.repository.ugm.ac.id/penelitian/detail/2197242023never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2204422023never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2204802023never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2233852023never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2235062023never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2235962023never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2236402023never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2240972023never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2241062023never1.0